After one mischief too many, the three rasquels are sent to a summer camp on an island (run by their arch enemy Wall-Enberg). Trouble maker Sickan soon hatches a plan…

The young Jönssonligan's plan to steal "millions of filmisar" faces problem after problem before uncovering something much greater.

It is summer holidays in the late 1950s and a fun fair comes to Wall-Entuna. All children obviously want to go there including Lilla Jönssonligan. Sickan then obviously has a…